<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表排序</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="userInfo.keyWord">
        <button @click='sortType = 2'>年龄升序</button>
        <button @click='sortType = 1'>年龄降序</button>
        <button @click='sortType = 0'>原顺序</button>       
        <ul>
            <li v-for="p,index in filterPersons" :key="p.id">
                {{p.name}}-{{p.age}}-{{index}}
            </li>
        </ul>
    </div>
</body>
    <script type="text/javascript">
        //#region  用computed实现
        const vm = new Vue({
            el:'#root',
            data:function(){
                return{
                    keyWord:'',
                    sortType:0,//0代表原顺序，1升序，2降序
                    persons:[
                        {id:'001',name:'马冬梅',age:21,sex:'女'},
                        {id:'002',name:'周冬雨',age:19,sex:'女'},
                        {id:'003',name:'周杰伦',age:18,sex:'男'},
                        {id:'004',name:'温兆伦',age:20,sex:'男'}
                    ]       
                }
            },
            computed: {
                filterPersons(){
                    const arr = this.persons.filter((p)=>{
                        return p.name.indexOf(this.keyWord)!=-1;
                    })
                    //判断是否需要排序
                    if(this.sortType != 0){
                        arr.sort((a,b)=>{
                            return this.sortType === 1 ? b.age-a.age:a.age-b.age
                        })
                    }
                    return arr;
                }
            },
            
        })
        //#endregion

        
    </script>
</html>